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KC

@achkc.bsky.social
559 followers 2.6K following 49 posts

Former CDC Epidemiologist & EIS fellow | Global Health | Applied Epidemiology | Tropical & Infectious diseases | Medicine | Humanity ☮️

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KC @achkc.bsky.social · 28/08/2026
CDC's updated epi curve(08/27): multistate Cyclospora outbreak linked to processed iceberg lettuce • 11458 cases in 20 states • 9256 with illness-onset dates Still unknown: • Why two peaks in June and July • Did the 07/17 recall alter the outbreak trajectory #Cyclospora #episky #IDsky #medsky
Stacked daily epi curve of 17,180 laboratory-confirmed, domestically acquired U.S. cyclosporiasis cases by illness onset, May 1–August 19, 2026. Dark blue bars show 9,256 outbreak-linked cases with available onset dates from the 11,458-case, 20-state outbreak linked to processed iceberg lettuce from Taylor Farms de Mexico. Light blue bars show the remaining national curve and are not confirmed non-outbreak cases. A smaller late-June wave is followed by a larger peak of 1,475 national cases on July 10, including 1,001 outbreak-linked cases. An orange line marks the July 17 recall. Hatched shading from July 13 onward indicates the six-week reporting-lag window, during which counts remain incomplete.
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Lisa Jarvis @lisamjarvis.bsky.social · 21/08/2026
My latest for @opinion.bloomberg.com: thoughts on Moderna & Merck's successful Phase 3 trial for its mRNA-based vaccine in melanoma. We are on the cusp of finally realizing scientists' decades-long dream of teaching the immune system to spot and destroy cancer cells. Pretty amazing! (🎁 link)
bloomberg.com
Moderna and Merck's Cancer Vaccine Is the Advance We've Been Waiting For
Scientists are on the cusp of fulfilling a decades-long quest: to use vaccines to teach the immune system to spot and destroy cancer cells.
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KC @achkc.bsky.social · 21/08/2026
2026 cyclosporiasis outbreak follow-up: How do we explain the two-wave illness-onset pattern, or determine whether the July 17 lettuce recall altered the outbreak’s trajectory? The curve describes the pattern; it cannot yet explain it. #Episky #Cyclospora #PublicHealth #medsky #idsky #cdc @fda.gov
Stacked daily epi curve of 15,716 laboratory-confirmed, domestically acquired U.S. cyclosporiasis cases with illness onset from May 1 through August 13, 2026. Dark-blue bars represent CDC’s published onset counts for 6,264 of 10,930 cases linked to the processed iceberg-lettuce outbreak; light-blue bars are the calculated remainder of the national curve. The national total and published outbreak subset peak on July 10. An orange line marks the July 17 Taylor Farms recall. Shading from July 6 onward identifies the six-week reporting-lag window.
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KC @achkc.bsky.social · 18/08/2026
National data from 47,366 Tanzanian schoolchildren: anemia declined from 48.0% in 2019 to 40.9% in 2023, yet remains a severe public-health problem calling for integrated, subnationally tailored interventions. #Anemia #Tanzania #GlobalHealth #EpiSky #ChildHealth #publichealth #Idsky #publichealth
link.springer.com
Trends in prevalence and predictors of anemia among school-aged children in Tanzania: analysis of 2019–2023 cross-sectional surveys using a multilevel logistic regression model - BMC Public Health
Background Anemia constitutes a major global public health challenge among school-aged children with documented impacts on psychomotor development, academic achievement, susceptibility to infections, ...
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Robb Barnes 🇨🇦 @robb-barnes.bsky.social · 18/08/2026
Another day, another reckless and idiotic own goal by the Trump administration. Unfortunately, all of us will suffer from gaps in understanding about the Arctic, which is key to our future in a heating world. www.theguardian.com/us-news/2026...
theguardian.com
Trump administration pulls support for annual Arctic environmental report
Move by National Oceanic and Atmospheric Administration is latest government rollback of climate science activity
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J. Offir, PhD @joffirphd.bsky.social · 17/08/2026
🎁 🔗 MMR, DaTP, polio & varicella vax rates are still going down, down, down across > half of US states, & non-medical vax exemptions are up in 41 states/DC. That's 8 potentially deadly diseases Americans are less able to avoid, thanks to RFK & the ignorant "wellness" movement. wapo.st/4zsc3LC
wapo.st
Kindergarten vaccine exemptions jump to another record high
Coverage among kindergartners for major vaccines fell in more than half the states, continuing a years-long trend, as measles cases climb.
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Kathryn Ingold FFPH @kathryningold.bsky.social · 18/06/2026
Another recent public health success: www.bbc.co.uk/news/article...
bbc.co.uk
Cervical cancer deaths fall to zero in young women given HPV vaccine
A new study finds that hundreds of lives have been saved since school-age girls were offered the HPV jab in 2008.
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KC @achkc.bsky.social · 18/08/2026
Tack! Tak! to the Scandinavian researchers who wrote to @washingtonpost.com what should be obvious: vaccines do not cause autism, and vaccine policy must follow evidence. It’s sobering that saying so now feels like leadership. #publichealth #idsky #PedSky #medsky @ki.se @ssi-dk.bsky.social
wapo.st
Opinion | We study autism and vaccines. Trump’s executive order rests on flawed science.
The new childhood vaccine schedule and 6G, in readers' eyes.
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Dr. Céline Gounder @celinegounder.com · 15/08/2026
Japan split its MMR shot in the 1990s. Mumps coverage fell to a third of kids. I spoke with New York magazine's Nia Prater. Save and send: nymag.com/intelligencer/article/tru… Read & subscribe for free: celinegounder.com
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KC @achkc.bsky.social · 15/08/2026
Evidence-rich NYT reporting: internal emails show how delays in getting standardized supply-chain records slowed the Cyclospora traceback. We need a deeper investigation of why the FDA Food Traceability Rule was delayed, who pushed for it, and why @by-cjewett.bsky.social #FoodSafety #publichealth
nytimes.com
How Cyclospora Evaded the U.S. Food Safety System to Sicken Thousands
The Trump administration delayed a rule last year that could have sped up the effort to pinpoint the source of the contamination. Critics charge that food safety oversight has eroded overall.
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KC @achkc.bsky.social · 15/08/2026
Great NYT reporting by @alicecallahan.bsky.social A seperate hotwash question: did the July 17 recall of Taylor Farms iceberg lettuce help? CDC’s Aug 13 provisional epi curve suggests cases were already falling before the recall #publichealth #IDsky #medsky #episky www.nytimes.com/2026/08/14/w...
nytimes.com
Is It Safe to Eat Lettuce and Other Fresh Produce as Cyclospora Outbreak Wanes?
As the largest cyclospora outbreak in U.S. history wanes, experts weigh in on whether iceberg and other fresh produce are still a risk.
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Erika Franklin Fowler @efranklinfowler.bsky.social · 31/07/2026
Great thread relevant for #wesgov214 #wesgov372 and #wesgov366 🧵⬇️
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Julia Robinson @juliarobinson.bsky.social · 11/11/2024
Here as the Executive Editor of PLOS Global Public Health, but moreso as a human (who lives in North Texas 😬) concerned about the world and hoping to contribute to making it a better place.
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Sadie J. Ryan (she/her) @sjryan3.bsky.social · 13/11/2024
Ok folks, now more than ever, we need to Be Kind and do Good Science. This means digging in, producing the evidence, communicating clearly and sincerely, celebrating our collective curiosity, and being mindful of the spaces we are and can be in.
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KC @achkc.bsky.social · 15/08/2026
Congrats to @rlsdvm.bsky.social and team!! The sensitivity analysis excluding 2020-2022 stands out! Separating true clustering from pandemic-era surveillance disruption instead of just flagging it as a limitation is the rigor that's easy to skip and shouldn't be.Excited for the case-level data next.
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KC @achkc.bsky.social · 14/08/2026
@washingtonpost.com highlights why delayed field deployment undermines root-cause analysis of the scale of the Taylor Farms-linked Cyclosporasis outbreal. One piece that's been largely absent from media coverage: the up-to-six-week delay in case classification, it deserves scrutiny too. #Cyclospora
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KC @achkc.bsky.social · 14/08/2026
@bmj.com has retracted a 2024 paper that reported an excess 3.1 million deaths in 47 western countries during 2020–2022, but did not establish a causal link to COVID vaccination. #PublicHealth #MedSky #EpiSky #SciSky #ResearchIntegrity #Retraction #COVID19 bmjpublichealth.bmj.com/content/4/3/...
bmjpublichealth.bmj.com
RETRACTION: Excess mortality across countries in the Western World since the COVID-19 pandemic: ‘Our World in Data’ estimates of January 2020 to December 2022
This article1 is retracted by the journal.
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Richard M. Carpiano, PhD, MPH @rmcarpiano.medsky.social · 14/08/2026
"...neighborhoods where the share of undocumented residents grew actually saw greater reductions in property crime and no significant change in violent crime, contrary to what many claim." sociology policy demography polisky
socialecology.uci.edu
Large-scale study finds no link between crime and unauthorized immigration | School of Social Ecology
Research team analyzed 11,500 neighborhoods over a decade
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KC @achkc.bsky.social · 14/08/2026
Lettuce: to eat or not to eat? FDA says most illnesses began before Taylor Farms’ July 17 recall. CDC’s Aug. 13 epi curve suggests the outbreak was already tapering by then but reporting lags blur the picture. Excellent piece by @lisamjarvis.bsky.social via @bloomberg.com #publichealth #IDsky
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Angela Huttner @angelahuttner.bsky.social · 14/08/2026
Happy to be part of this free online series introducing the use of statistics within clinical trials, conceived and developed by the superstars of ADVANCE-ID #IDSky #MedSky #EpiSky
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KC @achkc.bsky.social · 14/08/2026
𝗗𝗶𝗱 𝘁𝗵𝗲 𝘃𝗼𝗹𝘂𝗻𝘁𝗮𝗿𝘆 𝗿𝗲𝗰𝗮𝗹𝗹 𝗼𝗳 𝗽𝗿𝗼𝗰𝗲𝘀𝘀𝗲𝗱 𝗶𝗰𝗲𝗯𝗲𝗿𝗴 𝗹𝗲𝘁𝘁𝘂𝗰𝗲 𝗮𝗹𝘁𝗲𝗿 𝘁𝗵𝗲 𝘁𝗿𝗮𝗷𝗲𝗰𝘁𝗼𝗿𝘆 𝗼𝗳 𝘁𝗵𝗲 𝟮𝟬𝟮𝟲 𝗖𝘆𝗰𝗹𝗼𝘀𝗽𝗼𝗿𝗮 𝗼𝘂𝘁𝗯𝗿𝗲𝗮𝗸? The observed peak of cases and decline preceded the July 17 recall of potentially contaminated lettuce ( see graphic below). #medsky #publichealth #episky #idsky @altcdc.altgov.info @fda.gov
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KC @achkc.bsky.social · 11/08/2026
"As of December 2025, 69.4% of e-cigarette product sales in convenience and grocery channels were estimated to be unauthorized. Most unauthorized products were disposable devices in flavors that may appeal to young people." #publichealth evidence.nejm.org/doi/full/10....
evidence.nejm.org
Sales of Unauthorized E-Cigarettes in the United States, December 2025
The rapidly changing U.S. e-cigarette marketplace is dominated by unauthorized products. We used retail scanner data from Circana, a market research company that collects point-of-sale scanner data...
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KC @achkc.bsky.social · 11/08/2026
On Aug. 10, the White House issued “Delivering Gold Standard Childhood Vaccine Recommendations for Americans.” When federal guidance abandons science; clinicians, states, faith leaders and communities must step up. Prevention delayed is protection denied. #publichealth #idsky #medsky #episky
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TRAstonDrs @castltrastondrs.medsky.network · 04/08/2026
#Medsky🧪 #IDsky #publichealth #vaccineswork #mRNA vaccines are safe with low risk of complications and negative reactions based on safety surveillance www.thelancet.com/journals/lan...
thelancet.com
Safety and efficacy of mRNA vaccines: a mechanistic and public health perspective
mRNA vaccines represent a transformative advance in vaccinology, combining rapid development timelines, scalable manufacturing, and strong immunogenicity with a favourable safety profile. Global deplo...
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KC @achkc.bsky.social · 03/08/2026
Tularemia aka "Rabbit fever" : "People can become infected in several different ways, including tick and deer fly bites, and contact with infected animals (especially rodents, rabbits, and hares)." You can read more about the illness here: www.cdc.gov/tularemia/ab...
cdc.gov
About Tularemia
Tularemia is a potentially serious illness caused by the bacterium <em>Francisella tularensis.</em>
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Alt CDC (they/them) @altcdc.altgov.info · 03/08/2026
The measles, mumps, and rubella vaccine (MMR) protects you against rubella virus. If you are infected with rubella while pregnant, the virus can cause serious birth defects in your baby. #NationalImmunizationAwarenessMonth
A young child wearing a pink toy tiara, pearl necklace, and floral dress plays with a toy tea set while seated beside a white stuffed unicorn with a blue horn. Overlaid text reads: “She thinks ‘Rubella’ is a magical princess.” A banner below states, “Childhood vaccinations keep it that way.” The CDC logo appears in the bottom-right corner. The image promotes childhood vaccination by emphasizing that vaccines protect children from diseases such as rubella.
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KC @achkc.bsky.social · 03/08/2026
No one in the United States should die from severe diarrhea and dehydration caused by a feco–orally transmitted pathogen. Sad!! #cyclospora #medsky #idsky #medsky #publichealth #episky apnews.com/article/mich... reports the first 2 US deaths related to a diarrhea-causing parasite
apnews.com
Michigan reports the first 2 US deaths related to a diarrhea-causing parasite
State health officials say two people have died in the cyclospora outbreak in Michigan. They are the first confirmed deaths in the U.S. related to the microscopic parasite.
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KC @achkc.bsky.social · 03/08/2026
For healthy, full-term newborns stop: 1. treating early milk as insufficient and rushing to formula; 2. discouraging pacifiers; and 3. pushing breast pumps too soon. Their message: colostrum is enough, the pacifier isn’t the enemy, and the pump can wait. doi.org/10.1080/1476...
doi.org
Colostrum is enough, the pacifier is not the enemy, and the pump can wait: a narrative review of common misconceptions affecting early breastfeeding in healthy term neonates
Background: Despite strong evidence supporting exclusive breastfeeding (EBF) for the first six months of life, global and national rates remain suboptimal. In the critical first 48–72 hours after b...
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James Holland Jones @juemos.bsky.social · 03/08/2026
Most-recent common ancestor of the bacterium that causes Lyme disease was about 60,000 years ago, well before there were people in the Americas. I don't think the chipmunks were doing gain-of-function experiments. Figure 3 from Walter et al. (2017): doi.org/10.1038/s415...
Phylogeny (i.e., inferred evolutionary tree) of the spirochete bacterium that causes Lyme disease.

Dated phylogeny of B. burgdorferi in North America. MCC tree of
the best-fitting model inferred with BEAST (relaxed log-normal molecular clock model; Bayesian skyline population size). Tips are coloured by sampling region. Evidence of ancient midwestern ancestry (the oldest internal node in each clade with support for ancestral location in the midwest) is labelled ‘MW’. Branch lengths are in years bp. Blue bars at each interior node represent 95% credible intervals of estimated node age. Branches are labelled with posterior probability values (not shown for shallow nodes for clarity).
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KC @achkc.bsky.social · 03/08/2026
Climate warming could shift Africa’s malaria burden. In already-hot West and Central Africa, it may make some areas less suitable for transmission. But in high-elevation East- and southern-Africa, warming could make cooler areas more suitable, increasing cases. #idsky www.nature.com/articles/s41...
nature.com
The past and future impact of climate change on childhood malaria in Africa - Nature
Climate and econometric&nbsp;modelling reveal that human-induced climate change is shifting the burden of childhood&nbsp;malaria in Africa.
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KC @achkc.bsky.social · 01/08/2026
@celinegounder.com fact-checks and contextualizes several claims made during the Fauci hearing, showing where accurate details were presented in potentially misleading ways. We need more of this so the historical record remains accurate! #publichealth #medsky #idsky #episky #fauci #senatehearing
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KC @achkc.bsky.social · 01/08/2026
Healthcare staffing shortages are driving a patient care quality crisis www.axios.com/sponsored/he... #medsky #publichealth
axios.com
Healthcare staffing shortages are driving a patient care quality crisis
From hospitals and clinics to doctors' offices and urgent care centers, healthcare executives and clinicians agree: staffing shortages directly compromise their ability to provide high-quality care to...
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KC @achkc.bsky.social · 31/07/2026
"Malaria and cancer: common features and interactions" Intersting Review article published in Trends in Parasitology #idsky #episky #medsky www.cell.com/trends/paras...
cell.com
Malaria and cancer: common features and interactions
Malaria and cancer are major global health burdens, causing high mortality. While often considered distinct, the two conditions share common features, including continuous cell replication within the ...
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Reva L. Katz, MSci. @epireva.bsky.social · 30/07/2026
“Fauci is practicing epidemiology. His critics are practicing idiocy. Both are very good at their chosen work.” -- Michael Gerson, April 2021
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KC @achkc.bsky.social · 29/07/2026
Excellent reporting by Laura Martín Agudelo on why Cyclospora outbreaks are so hard to trace. One key epi point: case reporting lags of up to 6 weeks significantly impairs outbreak investigation and response. #EpiSky #Cyclospora #idsky @martinenserink.bsky.social www.science.org/content/arti...
science.org
Why is tracing the source of cyclosporiasis outbreaks so difficult?
Parasite’s biology, combined with logistical issues and budget cuts, make tracking it a major challenge
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KC @achkc.bsky.social · 29/07/2026
CDC’s July 24 Cyclospora Outbreak epi curve has prompted many interpretations, this is my preliminary take, which I’ll update as more data become available. Source: lnkd.in/eyJncA-f @altcdc.altgov.info @fda.gov #publichealth #cyclospora #episky #idsky #medsky #TaylorFarms #TacoBell #Lettuce
Infographic of CDC Cyclospora outbreak data: 1,947 confirmed cases across nine states, at least 98 hospitalizations, and no deaths. Panel A shows apparent peaks on June 24 and July 9; Panel B shades the six-week reporting-lag window, emphasizing that the curve remains provisional.
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KC @achkc.bsky.social · 29/07/2026
A defense of MAHA that begins by conceding its political champions wrecked scientific infrastructure, promoted antivaccine views, and undermined expertise doesn’t rebut the critics, it summarizes them. Public health doesn’t need MAHA. MAHA needs public health’s credibility!!
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KC @achkc.bsky.social · 29/07/2026
@bethmariem.bsky.social Thank you for correctly describing FoodNet’s objective. It is essential for tracking trends and burden of foodborne illnesses, not real-time outbreak detection or response. The cuts matter, but so does precision, and too many accounts have blurred that distinction.
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KC @achkc.bsky.social · 29/07/2026
What’s in a name? A Neisseria by any other name may not smell as sweet but do audit your freezer!
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KC @achkc.bsky.social · 28/07/2026
On #WorldHepatitisDay: Hepatitis E Virus causes 20 M infections/3.3 M symptomatic cases annually. A hepatitis E vaccine was 95.5% effective in a 2007 trial, yet was never developed further. Why? www.nejm.org/doi/full/10.... @worldhepalliance.bsky.social #idsky #episky #medsky #publichealth
Cumulative Hazard of Hepatitis E.
The cumulative hazard of a first hepatitis E episode (i.e., the incidence rate) was estimated as a minus-log transformation (log data to nonlog data) of the Kaplan–Meier survival curve during the period after the administration of the first dose of study drug until the end of the study among all subjects who received at least one dose of either vaccine or placebo. The numbers below the graph are the numbers of patients in each group remaining under surveillance at 100-day intervals. The difference between subjects who received placebo and those who received vaccine was significant (P<0.001 by the log-rank test). Vaccine efficacy from the first dose, calculated with the Cox regression model, was 89.9% (95% CI, 77.9 to 94.5%).
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KC @achkc.bsky.social · 28/07/2026
Apparently these funding opportunities include relocation grants for entire countries. Up to $80 million for data, surveys, and surveillance but apparently not a dollar for cartography!! #Africa #GlobalHealth #Cartography #DataVisualization #MapFail
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Julia Raifman, ScD @juliaraifman.bsky.social · 28/07/2026
Mitch McConnell and other members of Congress deserve paid sick leave So does everyone working in every other job
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KC @achkc.bsky.social · 27/07/2026
Absolutely agree with Dr. Hammer @epihammer.bsky.social . Data and hypotheses generated through #Fieldepi inform academic research in many ways. That’s why funding for shoe-leather epidemiology must be preserved, it strengthens both public health practice and the sciences. #EpiSky #PublicHealth
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KC @achkc.bsky.social · 27/07/2026
Child dies from complications of measles years after infection #publicHealth #Medsky🧪 #IDsky www.gavi.org/vaccineswork...
gavi.org
Child dies from complications of measles years after infection – SSPE explained
Why falling vaccination rates put vulnerable children at risk.
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JAMA Health Forum @jamahealthforum.com · 27/07/2026
📢 Now accepting applications: 2027 JAMA Health Forum editorial Fellowship. Scholars with a doctoral degree interested in the policies that shape health are encouraged to apply for this fellowship to receive hands on training. Applications due September 1, 2026. 🔗 ja.ma/3T1W71O
JAMA Health Forum logo with JN logo. Text: Call for Applications: Editorial Fellowship. Due September 1, 2026. Background is a blue-tinted image of hands typing on a laptop keyboard.
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Prof Gavin Yamey MD MPH @gavinyamey.bsky.social · 27/07/2026
Same rationale RFK Jr uses (“only sick kids should die of measles,” he said). Congress appropriated $600M for Gavi, which supports vaccines for half the world’s kids—but RFK Jr has halted payment, so an estimated 600,000 kids will die. These are kids in low income nations, so why would he care? 😢
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KC @achkc.bsky.social · 27/07/2026
Taylor farms calls white house to delay recall ! what's next? www.theguardian.com/us-news/2026...
theguardian.com
‘Not standard’ for Taylor Farms to ask White House to delay cyclospora recall, ex-FDA head says
Scott Gottlieb responds to report that company contacted the White House seeking to delay a recall announcement
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